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Segment Information (Summary of Sales by Major Product) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]      
Net sales $ 8,698 $ 8,284 $ 8,762
Metal beverage cans and ends      
Segment Reporting Information [Line Items]      
Net sales 5,085 4,834 4,957
Metal food cans and ends      
Segment Reporting Information [Line Items]      
Net sales 2,331 2,213 2,410
Other metal packaging      
Segment Reporting Information [Line Items]      
Net sales 887 877 977
Other products      
Segment Reporting Information [Line Items]      
Net sales $ 395 $ 360 $ 418